Fix non-DRM playback.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=128353039

library/src/main/java/com/google/android/exoplayer2/video/MediaCodecVideoRenderer.java

@@ -176,11 +176,13 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer {
     if (!MimeTypes.isVideo(mimeType)) {
     if (!MimeTypes.isVideo(mimeType)) {
       return FORMAT_UNSUPPORTED_TYPE;
       return FORMAT_UNSUPPORTED_TYPE;
     }
     }
-    DrmInitData drmInitData = format.drmInitData;
     boolean requiresSecureDecryption = false;
     boolean requiresSecureDecryption = false;
+    DrmInitData drmInitData = format.drmInitData;
+    if (drmInitData != null) {
       for (int i = 0; i < drmInitData.schemeDataCount; i++) {
       for (int i = 0; i < drmInitData.schemeDataCount; i++) {
         requiresSecureDecryption |= drmInitData.get(i).requiresSecureDecryption;
         requiresSecureDecryption |= drmInitData.get(i).requiresSecureDecryption;
       }
       }
+    }
     MediaCodecInfo decoderInfo = mediaCodecSelector.getDecoderInfo(mimeType,
     MediaCodecInfo decoderInfo = mediaCodecSelector.getDecoderInfo(mimeType,
         requiresSecureDecryption);
         requiresSecureDecryption);
     if (decoderInfo == null) {
     if (decoderInfo == null) {